Pipe flask



J. R. M WANE Oct. 6, 1931.

PIPE FLASK Filed Sept. 9, 1929 2 Sheets-Sheet l Oct. 6, 1931. McWANE 1,826,083

' PIPE FLASK 2 Sheets-Sheet 2 Filed Sept. 9, 1929 ATTORNEYS Fatented Oct. 6 1931 UNITED PATENT ores R, MCWANELD/F BIRMINGHAM, ALABAMA, ASSIGNOR TO MCWANE CAST IRON PIPE COMPANY, OF BIRMINGH-AM,ALABAMA, A CORPORATION OF ALABAMA PIPE FLASK Application filed. September 9, 1929. Serial No. 391,411.

structedand-arrangedtofacilitate quick rammingv and to strengthen the completed molds so that they canbe supported at their opposlte ends without undue bending-in the middle.

qAlSO, the invention contemplates improved means to enable the flasks to be stacked upon each other.

In the accompanying drawings Fig. 1 is a side elevation of a flask embody- 1'5 ing the invention;

Fig. 2 is a top plan view of the drag in Fig. 1;

Fig. 3 is a top plan view of the cope in Fig. 1;

Fig. 4: is a fragmentary, central sectional view through both flask sections at one end, being drawn on an enlarged scale;

Fig. 5 is a sectional view taken on the line 55 of Fig. 1;

Fig. 6 is a sectional View taken on the line 66 of Fig. 1; and

Fig. 7 is an end view of the flask.

Heretofore, it has been customary to employ wooden, trough-shaped, sand hoppers or guides to expedite filling and ramming pipe flasks. Such hoppers have to be picked up by two workmen and set over the sand receiving openings of the flasks and, after the flasks are rammed, they have to be removed. .These operations are both laborious and time consuming and involve an unnecessary expense. The flasks for making long lengths or sections of pipes of the small sizes must be sufliciently strong to resist bending when they are picked up and supported at their opposite ends by a crane or the like. If the flasks bend too much, the molds will be destroyed or badly damaged.

Referring particularly to the drawings, the improvements are there embodied in a pair of flask sections somewhat similar to the ones shown in my Patents 1,557 ,072 and 1,601,450.

In the present example, the flasks are designed to mold two pipe sections, but it is to be understood that this invention may be applied to flasks for molding one or more pipes.

Herein, the flask sections or units comprise elongated hollow shells or body portions 10 having outwardly converging side walls and, at. intervals, transverse division plates or webs ll are connected between the side walls as shown in my prior patents.

Atthe opposite ends of the drag and the cope units are pairs of trunnions 12 of different lengths to facilitate handling the molds by meansof a crane. Also, the drag section hasintegral brackets or lugs 13 and bolt receiving slotsl near the ends to provide for centering the core bars as disclosed in my.

Patent; 1,601,450.

According to this invention, flared or trough-shaped sand hoppers 15 are cast in tegralwith the walls of the flask sections at theedgesofthe sand receiving openings. The side walls of the hoppers are preferably of the same thickness as'the walls of the flask sections; Thesize of the hoppers may be varied according to the sizes of the molds or the pipe to be castin; them. The idea is to provide the. excess sand needed so that after the sand is rammed or. compressed into smaller bulk, the flaskiproperwill be sutficiently full without additional shoveling and ramming. To facilitatehand ramming, there are no transverse webs in. the hoppers to interfere with the tamping implements, (see Figs. 4c, 5 and 6).

To add'greatly to the strengthor bending resistance of the flask sections there are a series of external webs 16-01 ribs integral with the sidewalls of the flasks and the outside-walls of the hoppers. These webs are preferably, though not necessarily, in the same plane as the divisionv plates or webs, (Figs. 3 and 5). This arrangement of the webs makes the flask sections very rigid so that they, do not sag when lifted nor become distorted, quickly due to the heat to which they are subjected;

Toenable the flask sections to be stacked vertically for. storage, certain of the external webs 16 are extended so that they are substantially, rectangular in outlineand their u per edges are flush with the mouths of the troughs. See Fig. 5.

Herein, only three such webs are shown, but it will be understood that any number may be employed. In a stack of flasks the webs 16 are arranged one above another and help support the stack and give it stability. Furthermore, they prevent the sections from being turned over easily when the hoppers rest on the foundry floor.

From the foregoing description, it will be seen that the improved flasks eliminate the old wooden hoppers and thereby save considerable time and expense. Further, the flasks are much stronger and more rigid than the old flasks and obviate damage to the rammed molds in handling. Moreover, the flasks will last longer before they become badly warped.

Obviously, the present invention is not restricted to the particular embodiment thereof herein shown and described. Moreover, it is not indispensable that all the features of the invention be used conjointly, since they may be employed advantageously in various combinations and sub-combinations.

What is claimed is:

1. A flask section for molding elongated castings such as pipe, comprising an elongated body having side walls and end Walls; and a sand hopper integral with the body and having its side walls directly joined onto the upper edges of the side walls of the body and extendin for the length of said side walls; said san hopper being so constructed and arranged as to minimize deflection of the flask section when lifted at its ends.

2. A flask section for molding elongated castings such as pipe, comprising an elongated body having side walls which converge toward the top, and end walls; a sand hopper integral with the body and having its side walls directly joined onto the upper edges of the side walls of the body and extending for the length of said side walls; and spaced, transverse strengthening webs integral with the side walls of the body and hopper and lying wholly outside said walls.

3. A flask section of the character despaced, transverse strengthening members extending between the outside walls of the flask section and the hopper walls.

6. In a pipe mold for making molds of the character described, flask units each having inwardly converging side walls; hopper walls integral with said side walls; and spaced vertical strengthening webs integral with said side walls and hopper walls and presenting edges flush with the outer edges of the hopper walls adapted to abut each other when the units are stacked on each other and aflord stable supports for the stack.

7. In a pipe mold for making molds of the character described, flask units each having inwardly converging side walls; hopper walls integral with said side walls; and a plurality of external strengthening webs on 0pposite sides of the units connecting said side walls and hopper walls, some of said webs being wider than the others and presenting edges substantially flush with the outer edges of the hopper walls to afford stable supporting members when the units are stacked.

In testimony, that I claim the foregoing as my own, I have hereto aflixed my signature.

JAMES R. MCIVANE.

scribed, having an integral sand-receiving hopper; and spaced, transverse strengthening webs integral with and connecting the outside walls of the flask section and the sides of the hopper and lying wholly outside the flask section.

4. A flask section for making molds of the character described, comprising an elongated flask body having inwardly converging side walls; and a sandhopper integral with the outer edges of said side walls presenting outwardly diverging side walls.

5. A flask section for making molds of the character described, having provision to be supported at both ends; inwardly converging side walls; outwardly diverging hopper walls on the outer edges of said walls; and 

